cervical and cranial nerves

Question 1

ansa cervicalis superior root levels and inferior root levels

Answer 1

superior: C1-C2
inferior: C2-C3

Question 2

Superficial cervical nerves from C2-3

Answer 2

lesser occipital nerve
greater auricular nerve
transverse cervical nervre

Question 3

superficial cervical nerves from C3-C4

Answer 3

supraclavicular nerves

Question 4

where is the loop of the ansa cervicalis located

Answer 4

near the tendon of the omohyoid muscle

Question 5

what does the ansa cervicalis directly innervate?

Answer 5

all the infrahyoid muscles except the nerve to the thyrohyoid

Question 6

superior root of AC followed up to find what nerve which gives off what nerve

Answer 6

hypoglossal nerve

gives off nerve to thyrohyoid m

Question 7

what is the landmark near the n to thyrohyoid

Answer 7

tip of hyoid bone in heart of carotid triangle

Question 8

where does the the phrenic nerve cross and lie

Answer 8

crosses anterior scalene, posterior to IJC

Question 9

what crosses over the phrenic nerve?

Answer 9

transverse cervical artery

suprascapular artery

Question 10

what artery follows the phrenic nerve

Answer 10

ascending cervical artery

Question 11

GSA fibers convey what info from where and localization?

Answer 11

pain, temp, tactile, pressure, proprioception by trigeminal nerve to structures of ectodermal origin
-sharp, highly localized sensations

Question 12

General Visceral afferent fibers

Answer 12

visceral pain and reflexes

• vagus nerve distribution from posterior 1/3 of tongue to midportion of transverse colon
• dull achy, burning, poorly localized

Question 13

General somatic efferent

Answer 13

innervate muscles of myotomic origin, extraocular m and intrinsic m of tnogue

Question 14

general visceral efferent fibers

Answer 14

components of ANS and innervate SM and glands

-course with cranial nerves III,VII,IX,X

Question 15

All GSA fibers from cranial nerves ______ terminate where?

Answer 15

V,VII,IX,X

trigeminal sensory nuclei

Question 16

3 parts of trigeminal sensory nuclei and fnct

Answer 16

mesencephalic: proprioception info from facial muscles
main sensory nucleus: tactile discrimination info from face
descending nucleus of V: crude tactile, pain, temp from face

Question 17

solitary nucleus or NTS recieves what fibers

Answer 17

GVA and SVA
GVA from posterior 1/3 of tongue to mid transverse colon
SVA taste anterior 2/3 via VII and 1/3 posterior tongue via IX, and epiglottis via X
-Vagus nerve is main input

Question 18

motor nuclei fibers and what nucleus

Answer 18

GSE, muscles of myotomic origin
-oculomotor nucleus
-trochlear nucleus
abducens nucleus
-hypoglossal nucleus

Question 19

SVE nuclei innervate muscles of what origin

Answer 19

branchiomeri (branchial arches)

Question 20

trigeminal—> brachial arch __—> what muscles

Answer 20

brachial arch 1–> muscles of mastication

Question 21

facial to what brachial arch to what muscles

Answer 21

brachial arch 2 to muscles of facial expression

Question 22

nucleus ambiguus to what brachial arch to what muscles

Answer 22

arch 4 to pharyngeal and laryngeal muscles

Question 23

Lesions of nerve IX result in what

Answer 23

loss of GDS
gag relex
slight dysphagia
loss sensation in pharynx and posterior 1/3 of tongue

Question 24

lesions in cranial nerve X results

Answer 24

dysphonia
dysphagia
dyspnea
loss of gag or cough reflex

Question 25

lesion in accessory nerves

Answer 25

inability to shrug the shoulder and flex and rotate head

Question 26

lesion of cranial nerve XII results

Answer 26

deviation of protruded tongue towards affected side

Question 27

common characteristics of cranial nerves IX-XII

Answer 27

they all exit skull at jugular foramen and are at base of skull between IJV and ICA
-deep to parotid gland at neck of mandible

Question 28

vernet’s syndrome

Answer 28

basilar skull fracture involving jugular foramen = ipsilateral IX,X,XI paralysis

Question 29

collet’s or sicard’s syndrome

Answer 29

inury to retroparotid space

-paralysis of cranial nerves IX-XII and cervical sympathetic trunk (horner’s syndrome)